Are you looking at a different curve that I don't see? This is the V6 engine...

Hahah yeah we're seeing the same one. Sorry, wasn't too clear. I was commenting on how incredibly flat that torque curve is. Because of this, I think that GM's next V-8 that they develop should be a Direct Injected VVT DOHC motor so we can get awesome mileage, great power, and ridiculous torque curves like the one put up by the V-6.

Hahah yeah we're seeing the same one. Sorry, wasn't too clear. I was commenting on how incredibly flat that torque curve is. Because of this, I think that GM's next V-8 that they develop should be a Direct Injected VVT DOHC motor so we can get awesome mileage, great power, and ridiculous torque curves like the one put up by the V-6.

It should be higher than 11.4. That's very, very rich (lots of fuel, not enough air). 12.5 is about where you want it on a naturally aspirated motor for the best power. 14.7 is the "perfect" ratio, or stoiciometric ratio, where you have 14.7 parts air to 1 part fuel by weight and it creates a complete combustion.

And the ECU can be tuned (hopefully) to adjust this and many other parameters.

It should be higher than 11.4. That's very, very rich (lots of fuel, not enough air). 12.5 is about where you want it on a naturally aspirated motor for the best power. 14.7 is the "perfect" ratio, or stoiciometric ratio, where you have 14.7 parts air to 1 part fuel by weight and it creates a complete combustion.

And the ECU can be tuned (hopefully) to adjust this and many other parameters.

No, the computer right now is basically telling it for X amount of air entering the engine, inject Y amount of fuel to create a certain A:F ratio. The O2 sensor lets it know where the mixture is.

The thing about it is that at WOT (Wide Open Throttle) the engine goes into what is known as Open Loop mode. This is because the O2 sensors that come on cars are really only accurate close to the 14.7:1 ratio. As it gets further away from that number, it becomes exponentially more inaccurate. This is why a good tuner uses a wide-band O2 sensor. Anyway,when this happens, the ECU stops taking readings from the O2 sensor and basically injects a pre-determined amount of fuel. Engineers from the factory tend to play it safe and tell it to inject more than what is needed. You don't want to run lean at WOT. It would take more than a CAI to cause it to run 12.5:1. A tune is definitely in order.